Crossword Genius

Shoot with amusement (4)

Ross

I believe the answer is:

hoot

I'm a little stuck... Click here to teach me more about this clue!

'amusement' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'shoot with' is the wordplay.
'HOOT' is hidden within the letters.
But, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for hoot that I've seen before include "Sound of owl" , "Warning sound - something not given by the careless!" , "noise made by 7 [WOOD-OWL]" , "Screech" , "Funny thing (informal);bird call" .)

I've seen this clue in The Mirror.
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